Fig 1.
Cerro Condor Norte (dark grey asterisk) Sur (light grey asterisk), Las Chacritas (white asterisk) and Bagual (black asterisk) localities in Chubut, Argentina (modified from Rauhut [94]).
Table 1.
Tooth and craniomandibular specimens used for this study, affiliations and localities.
Fig 2.
General morphology of teeth shown in labial, lingual, and (where possible) in lateral and apical views, a: MACN-CH 2008.1; b: MACN-CH 2008.2; c: MACN-CH 2008.3; d: MPEF-PV 3059; e: MPEF-PV 3060; f: MACN-CH 2009; g: MPEF-PV 3058; h: MACN-CH 934; i: MPEF-PV 1670; j: MACN-CH 933; k,l: MPEF-PV 3174 and 3176 belonging to maxilla MPEF-PV 3341; m: MPEF-PV 3061.
Table 2.
General tooth measurements and characteristics.
Fig 3.
Craniomandibular material from the Cañadón Asfalto Formation, with tooth morphotypes based on enamel wrinkling.
a: MPEF-PV 1670; b: MACN-CH 933; c: MACN-CH 934; d: MPEF-PV 3341; e: Morphotype I; f: Morphotype II; g: Morphotype III.
Fig 4.
Morphotype I: a: exemplary specimen MACN-CH 2009 with b: schematic drawing of wrinkling pattern. c: MACN-CH 2008.1; d: MACN-CH 2008.3; e: MPEF-PV 3061; f: MPEF-PV 3059; g: MPEF-PV 1670; h: MPEF-PV 3060; i: MACN-CH 933; j: MPEF-PV 1670 newly erupted tooth; k: MACN-CH 2008.2; l: MPEF-PV 3058.
Fig 5.
Morphotype II: a: lingually exposed surface of tooth MACN-CH 934, b: Schematic drawing of wrinkling pattern; c: Labially exposed surface of replacement tooth MACN-CH 934 (note that the maxilla prevents a better view); d: Schematic drawing of (exposed) wrinkling pattern.
Fig 6.
Morphotype III: a: MPEF-PV 3341 maxillary tooth lingual and labial view; b: Schematic wrinkling; c: Apical part with denticles; d: Characteristic subcircular pits; e: Carina; f: Denticles in higher magnification; g: Bulge at base.
Fig 7.
Toothrows for comparison a: Camarasaurus CM 11338; b: Giraffatitan MB.R.2181.23.9; c: Diplodocid CM 11161; d: Juvenile diplodocid SMA N29–2.